Promote website and have more users sign up

I'm looking for an organized and creative freelancer to help me promote my website and increase user sign-ups. My target audience is global and I am specifically looking for assistance with Search Engine Optimization (SEO). This includes a variety of tasks such as keyword research, content optimization, competition analysis, etc. All SEO efforts should be focused on increasing user engagement and boosting website visibility on search engine rankings. The goal is to have as many new users sign up to my website on a weekly basis.